title: Removal of white mineral trioxide aggregate cement: a promising approach.
abstract: Removal of MTA from dentin by applying 37% hydrochloric acid (HCl) to reduce microhardness and push-out bond strength. Forty dentin slices were filled with WMTA and divided into two groups (n = 20). Ten slices remained untreated while others were exposed to either HCl or phosphate buffer saline (PBS) and all samples were subjected to pushout test. The mode of bond failures was determined by SEM analysis. Later, twenty glass tubes were filled with WMTA and divided into two groups (n = 10). One side of tube was exposed to HCl or PBS while the other side remained untreated and the microhardness was analyzed by testing machine. HCl showed significantly lower pushout strength and microhardness values (P = 0.0001), (P = 0.0001). HCl treated samples showed mixed bond failures dominantly, while PBS samples mostly showed adhesive failures. The results of this study can suggest the 37% HCl as an effective solution to aid the removal of MTA from the dentin surfaces.
authors.affiliation: Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Saghiri
authors.forename: Franklin
authors.initials: F
authors.lastname: Garcia-Godoy
authors.forename: James L
authors.initials: JL
authors.lastname: Gutmann
authors.forename: Nader
authors.initials: N
authors.lastname: Sheibani
authors.forename: Armen
authors.initials: A
authors.lastname: Asatourian
authors.forename: Mehrdad
authors.initials: M
authors.lastname: Lotfi
authors.forename: Mayam
authors.initials: M
authors.lastname: Elyasi
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D003738:Dental Cements / Q000737:chemistry*; D003804:Dentin / Q000737:chemistry*; D004338:Drug Combinations; D006801:Humans; D006851:Hydrochloric Acid / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D013499:Surface Properties
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003738:Dental Cements; D004338:Drug Combinations; D010087:Oxides; D017640:Silicates; C086631:mineral trioxide aggregate; D012965:Sodium Chloride; D006851:Hydrochloric Acid